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prevented. If an obstruction causes an over current state, the obstruction should be identified and
removed. If an overcurrent state is detected, the overcurrent LED on the Joystick Controller will be
illuminated.
Electronic limit stop:
The system tracks the orientation of the mount by reading the potentiometer outputs and will
prevent driving past a preset angle value held in the micro controller's non-volatile memory.
Driving the mount away from this limit is not inhibited.
Mechanical limit stop:
This is a mechanical limit adjusted to keep the mount from colliding with its structure. It uses
micro switches to turn off the ability to drive further into the stop by interrupting one side of the
motor driver. This is a last line of defense from a system failure, as it is fully independent from the
other safety systems. Driving the mount away from this limit is not inhibited.
Reverse power connection:
Power is diode protected from voltage polarity reversal. Recovery is immediate and without
damage.
Installation
The servo system is mounted with careful alignment and
bolted together. Additionally, the payload (supplied
separately) must be attached to the SPS. The steps for
this process are described below and should be read and
understood before any installation or assembly begins.
WARNING – Do not apply power until the installation
is complete!
Mounting:
Servo System:
The servo system is the part of the SPS that will
stabilize the payload. The servo system consists of the
main servo housing and the payload-mounting arm. The main servo housing has a circular plate
with four M6 threaded holes and four #12 or M6 clearance holes for mounting. Several steps
should be followed for a proper installation of the servo system:
1. The servo system is heavy and must be supported during installation to its mounting place.
Watson Industries, Inc.
SPS-P230 Rev A 10/17/2017
8
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